Bill Beaty's at it again! Our favorite crackpot physicist presents a backyard solution to that emergency need for cryogenic fluid. Sometimes you can't wait to freeze daisies.
Recipe: dry ice, soda bottles, and rubbing alcohol. The alcohol does not freeze to solid state. Instead, the dry ice (frozen CO2) supercools the alcohol creating a bath that can freeze a flower in seconds.
Be careful: this stuff sticks. Bill describes this homebrew as cryogenic napalm. So, heed his warnings, or risk losing your finger(s). Also, don't eat the flower after you've bathed it. Frozen = inedible.